20.直播水稲の出芽・苗立ちに対する5-アミノレブリン酸(ALA)含有肥料の促進効果(口頭発表)

概要

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Two experiments were conducted to examine the effectiveness of the fertilizer. Preparation of the seeds: The seeds were selected by specific gravity with salt and then sterilized in sodium hypochlorite solution before the seeds were treated with water or the diluted solutions of PKS for 1 or 2 days. Experiment 1: Test on the emergence and establishment of rice seedlings grown in submerged soil The seeds were seeded at 1cm or 2cm depth in soil covered with water at 3.5cm depth and grown at 15℃ or 20℃ for 10 days or 19 days. The rate of emergence and establishment of the seedlings increased with PKS treatment in the both tests conducted at 15℃ and 20℃. Especially the effectiveness was striking in the test conducted at 15℃. Experiment 2: Test on the growth of the rice seedlings grown in deep water The seeds were seeded in glass tubes filled with water at 3cm or 5cm depth and grown at 20℃ for 14 days. The length (2nd-leaf and root) and dry weight (aerial part and underground part) of the seedlings increased with PKS treatment in both tests conducted at 3cm and 5cm water-depth. Especially the promotive effectiveness was striking in the test conducted at 5cm waterdepth. These experiments show that the treatment with PKS enhanced the emergence and growth under low temperature, low oxygen and deep water conditions.
2010-10-01